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    Default Is it okay to leave your phone plugged in?

    Is it okay to leave your phone plugged in even after it's done charging?
  2. #2  

    Default Re: Is it okay to leave your phone plugged in?

    From what I remembered, it won't have any real affect on the battery, but it may have negative effects on the micro usb port over a long period of time (over the duration of a year or two.) After a year and a half of doing this similarly but plugging it into my computer instead, I had to replace my port because it corroded and had a salty residue on it. Not sure if it is necessarily from keeping it plugged in though.

    Sent from my Galaxy Nexus using Android Central Forums
  3. #3  
    erasat's Avatar

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    Default Re: Is it okay to leave your phone plugged in?

    Everybody has a different opinion about that, but I can tell you by experience that with recent phones/Chargers, there is a non-issue. I mean, I only put my phone to charge when going to sleep, so I won't be waking up in the middle of the night just to see if it completed or not, I'm not losing my sleep over that, so I've always done the same, and I can tell you that I have never had any issues with a battery before, my GS2 battery has been running for 2 years like that and it's still working like a champion, the same for my wife's myTouch 4g, in August will be 2 years charging the same way, and just before I replaced it this past weekend with a new GS3 that I got on Sam's Club for a dollar including taxes, it could go a full day of my wife's mobile use and it still had more than 60% of juice left.
  4. Thread Author  Thread Author    #4  

    Default Re: Is it okay to leave your phone plugged in?

    Okay thanks guys. It's nice to hear I shouldn't worry about it.
  5. #5  

    Default Re: Is it okay to leave your phone plugged in?

    It's ok for a wall charger, but not a car charger.
  6. #6  
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    Default Re: Is it okay to leave your phone plugged in?

    Quote Originally Posted by tx_tuff View Post
    It's ok for a wall charger, but not a car charger.
    It's OK for either.

    When the battery is charged, the phone stops charging the battery. When the battery needs a charge and power is available, the phone charges the battery. It doesn't matter whether that power is coming from a car charger, a laptop, a wall charger, or a portable battery pack. The phone will charge the battery when the battery needs charge, and will cease the charge cycle when it is complete.

    The only risk from car chargers or nasty cheap-o chargers is noise and/or voltage control. If your phone is expecting 5V and suddenly the voltage spikes or drops, this can damage the charge circuitry or the battery itself.
  7. #7  

    Default Re: Is it okay to leave your phone plugged in?

    I could be wrong but I was told a car charger is "Simple" charger as in the type. A simple charger does not alter its output based on time or the charge on the battery. So a battery left on a simple charger to long will/could be weakened or destroyed due to over charging.

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    Last edited by tx_tuff; 06-03-2013 at 04:50 PM.
  8. #8  
    NotJustAPhone's Avatar

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    Default Re: Is it okay to leave your phone plugged in?

    Keep the discussion civil and on-topic. If you have nothing constructive to add to the discussion, don't post in the thread.

    Sent from my Galaxy Note II
  9. #9  

    Default Re: Is it okay to leave your phone plugged in?

    I never had a problem with it. I charge it overnight, and as far as I know, the phone stops charging the battery once it reaches 100%.

    Sent from my awesome Note 2!!!!!!!!!
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  10. #10  

    Default Re: Is it okay to leave your phone plugged in?

    Quote Originally Posted by taniabonita52 View Post
    I never had a problem with it. I charge it overnight, and as far as I know, the phone stops charging the battery once it reaches 100%.

    Sent from my awesome Note 2!!!!!!!!!
    True, the phone will stop charging when the battery is at 99-100%. You also want to avoid "bump charging", where you unplug the phone at full charge, then plug it back into the charger. Bump charging will cause the overcharging circuit to re-initiate, and will over charge the battery until the over charging circuit recognizes that the battery is fully charged...which only takes a few seconds, but nevertheless still attempts to continue to charge the fully charged battery.
  11. #11  
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    Default Re: Is it okay to leave your phone plugged in?

    Quote Originally Posted by Coffeeman View Post
    True, the phone will stop charging when the battery is at 99-100%. You also want to avoid "bump charging", where you unplug the phone at full charge, then plug it back into the charger. Bump charging will cause the overcharging circuit to re-initiate, and will over charge the battery until the over charging circuit recognizes that the battery is fully charged...which only takes a few seconds, but nevertheless still attempts to continue to charge the fully charged battery.
    Huh, mine sometimes jumps from 100% to 97% after unplugging it from the charger, but a hot reboot fixed it.

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  12. #12  

    Default Re: Is it okay to leave your phone plugged in?

    Lithium batteries don't care, leave it charging, don't leave it, it will have no effect on battery life period, if you are using the correct charger. Try not to charge in temperature extremes, don't run them completely down, and make sure not to let them run flat when storing, end of story.
  13. #13  
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    Default Re: Is it okay to leave your phone plugged in?

    Be careful plugging in your chargers in your car....too much charging while the car is off can kill the car battery. B.f. accidentally left his charger plugged in after taking the phone off and went into the house....next morning car wouldn't start.

    From my S4 to you via Tapatalk 🍻
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  14. #14  

    Default Re: Is it okay to leave your phone plugged in?

    Quote Originally Posted by tx_tuff View Post
    I could be wrong but I was told a car charger is "Simple" charger as in the type. A simple charger does not alter its output based on time or the charge on the battery. So a battery left on a simple charger to long will/could be weakened or destroyed due to over charging.
    They're all "simple" chargers. The actual battery charger is in the phone. The wall/car charger is just a 5V supply that the battery charger converts to 4.2V. That internal charger monitors the battery voltage and the temperature and decides how much current to supply to the battery.
  15. #15  
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    Default Re: Is it okay to leave your phone plugged in?

    Quote Originally Posted by troshs View Post
    Be careful plugging in your chargers in your car....too much charging while the car is off can kill the car battery. B.f. accidentally left his charger plugged in after taking the phone off and went into the house....next morning car wouldn't start.

    From my S4 to you via Tapatalk 🍻
    This depends on your car or truck. My buddy's Silverado does this (the outlet stays live with the ignition off). My Jetta on the other hand does not. When I turn my ignition off the outlet gets no power, therefore I leave my charger plugged in and the battery isn't drained at all. Test it out plug your phone in with the engine running. Then when it's charging turn it off and then take the key out and open the door. If the phone stops charging your safe to leave the charger plugged in when your not using it.

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  16. #16  

    Default Re: Is it okay to leave your phone plugged in?

    Quote Originally Posted by troshs View Post
    Be careful plugging in your chargers in your car....too much charging while the car is off can kill the car battery. B.f. accidentally left his charger plugged in after taking the phone off and went into the house....next morning car wouldn't start.

    From my S4 to you via Tapatalk ��
    If that ran his car battery down, he needs a new car battery or a new charger. My wife never unplugs her charger and her car has been parked for 3 or 4 straight days many times without the charger running it down. Her outlet stays live at all times.
  17. #17  
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    Default Re: Is it okay to leave your phone plugged in?

    He does need a new battery. However it's just like accidentally leaving your dome light on at night.

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  18. #18  

    Default Re: Is it okay to leave your phone plugged in?

    You can leave it charging and it really won't matter. Of course the great thing about this phone is that even if something does go wrong with the battery you can buy a new one online for like $10 and pop it right in!

    Certainly one of the benefits of having a phone with a removable back cover.
  19. #19  

    Default Re: Is it okay to leave your phone plugged in?

    Quote Originally Posted by troshs View Post
    He does need a new battery. However it's just like accidentally leaving your dome light on at night.
    It shouldn't be. What are dome lights, like 10 W? That means that a 5 V source, like a phone charger would have to be putting out a constant 2 A to drain the battery as much as a dome light. That would only be true if the charger were charging a phone the whole time (i.e. the phone battery never got fully charged). If a phone isn't plugged in the only power it should be using is to maybe keep some circuitry alive (micro to milliamps) and maybe an LED (usually max out at 20 mA). So it should only use a hundredth of what a dome light was at the absolute maximum. So if it takes 5 hours for the dome light to drain your battery then it would take 500 hours (almost 3 weeks) for the charger to drain the battery. If it only takes 2 hours for the dome light it would be about a week for the charger it takes 10 minutes for the dome light to drain your battery it would still take the charger 16 hours. At that point you'd probably have a hard time starting your car no matter what.
  20. #20  
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    Default Re: Is it okay to leave your phone plugged in?

    Thank you.

    From my S4 to you via Tapatalk 🍻
    ~~ You have a cough? Go home tonight, eat a whole box of Ex-Lax, tomorrow you'll be afraid to cough.
  21. #21  

    Default Re: Is it okay to leave your phone plugged in?

    The answers to this question seem to be all over the map. I'm surprised that so few people have actually researched the true facts. Fifteen years ago or more, phones, batteries and chargers were different than they are now, but some of the advice that was floating around back then is still being offered today.

    I did my own research; I measured the current draw in all my devices with rechargeable batteries, and there was zero current draw, once the battery was fully charged. This brings into question the manufacturer's recommendation to "unplug your phone" once the battery is charged, to "save energy." Since there is no energy being used, how are you saving energy? You are not, but I suspect such decisions come from these companies' PR people and not from their engineers.

    I leave my phone plugged in whenever I can, and the result is that I have a full charge whenever I take the phone. Rarely do I have to contend with a low battery. Judging from what I see, not everyone can make that claim.

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